Sunken Journal from Umbra, a Mystery of the Shrine of Ancient Tears.
I've explored many bizarre and interesting places in my time, but this has to be my favourite! Beautiful waterfalls, areas hidden away until you drain water from them, ancient doorways that open when you light torches, I love it! But this place has left me with so many questions. Who collected the skulls? Why is this ancient building deep beneath the waves? And most importantly of all, where is the key for that triangular lock — and what's inside?